What is the last name of Zeke and Ginger?

What is the last name of Zeke and his sister Ginger?

On the episode of Zeke and Luther called "The Bro List", Zeke's last name is revealed but it isn't really clear if it is Valconi or Falconi (or Falcone).

Also on the episode "The Unusual Suspects" Zeke says Ginger's last name in the beginning of the show, and then later in the show Luther says Zeke's last name.

I have seen the following names on various websites about Zeke and Luther:

Zeke Valconi
Zeke Falconi
Zeke Falcone
Zeke Thatcher

Ginger Valconi
Ginger Falconi
Ginger Falcone
Ginger Thatcher


EDIT:

I have proof positive that Zeke and Ginger's last name is Falcone.

First of all, I got the answer from the official Disney XD channel on youtube:
http://www.youtube.com/watch?v=HqyceHfRYkQ


And then I found this official online press release from Disney XD:
www.disneyxdmedianet.com/DNR/2011/zl012411.doc

Press Release - Disney XD Medianet

Jan 24, 2011 ... Starring are: Hutch Dano ("Den Brother" and "Ramona and Beezus") as Zeke Falcone, Adam Hicks (from the upcoming Disney Channel Original Movie "Lemonade Mouth") as Luther Waffles, Daniel Curtis Lee ("Ned's Declassified School Survival Guide") as Kojo and Ryan Newman ("Hannah Montana") as Ginger Falcone.